PULSE ANNEALING OF FESIB AMORPHOUS WIRES

The magnetic field dependence of magnetization and Young's modulus of pulse-annealed Fe77.5Si7.5B15 are reported. Coercivity and anisotropy energy density were measured as a function of annealing current and th e tensile stress applied during annealing. It is shown that pulse anne aling can remove the internal stresses more effectively than furnace a nnealing. Coercivity and anisotropy energy density fall by a few perce nt for annealing currents up to 1 A. Currents between 1 A and 1.5 A re duce both quantities by nearly an order of magnitude. Higher annealing currents result in sharp increases in the parameters, as crystallizat ion begins.